You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to postpone my trip due to an emergency. Can you aid me in doing some modifications in my existing reservation?

ASSISTANT: Sure, I will help you in changing the ticket. May I know your name please?

USER: Thank you. Myself Betty Lewis.

ASSISTANT: Sorry, there are no reservations found.

USER: No issues. Thank you for checking and giving the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome, thank you for reaching us. Have a nice day.