You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Do you help me in cancellation of my recent reservation to Dallas?

ASSISTANT: Yes, our agency provides such services to our customers.

USER: Actually, I have made my recent reservation to Dallas with my name Frank Anderson. Due to some urgency, I need to cancel my reservation.

ASSISTANT: Sure Frank, please wait for a minute.

USER: It's a matter of urgency, I need it very urgent. Please do it fast.

ASSISTANT: Frank Anderson, there is no reservation found with your details.

USER: How can it be possible? According to my knowledge, I haven't cancelled it. Please check it once.

ASSISTANT: Ok Frank, with your request, I will once again check our records with your details. Please give me a minute.

USER: Ok, take sometime and let me know my reservation status.

ASSISTANT: Frank, I have checked our booking records history. I found that your payment for the ticket is unsuccessful. So, there is no reservation found.

USER: I guess I crossed my credit limit, may be that was the issue behind it.

ASSISTANT: Frank, I hope your query has been resolved. Would you like to know anything else?

USER: Yes and I don't need any other information. Thank you for your information.

ASSISTANT: Thank you for choosing us. Have a good day.