You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service you are expecting from us?

USER: Your agency have booked a ticket with wrong dates, can you help me in changing my reservation?

ASSISTANT: Sorry for the inconvenience, can you please let me know your name for checking the previous reservation status?

USER: I have booked a ticket in the name of Debra Turner.

ASSISTANT: Thank you for information, please wait for a moment. I will check the details and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Debra, there is no reservation found on your name in our database.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for your positive response, hope you have a great day.