You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that you are looking for?

USER: There is an emergency case which came to hearing on the dates which I have planned to enjoy in my holidays, so I am unable to travel the trip due to this one. Can you please help me in changing my flight ticket?

ASSISTANT: Sure, I am glad to help you in modifying the ticket details once I have found your reservation.

USER: Thank you.

ASSISTANT: Can you please tell me your name with which you have reserved the ticket?

USER: Yes, the previous reservation is done under the name of Daniel Lewis.

ASSISTANT: Ok, please let me check your ticket status in our records and get back to you.

USER: Please check it fast because it is an emergency for me to travel to Oakland.

ASSISTANT: When I have checked in our records, I haven't found any reservation on your name.

USER: That's ok, no problem. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for choosing us. Have a nice day.