You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am trying to modify my travelling dates in my past ticket because they are wrongly printed. Can you please help me in changing the ticket?

ASSISTANT: Sure, I will help you in modification of your reservation. May I know your name please?

USER: My name is Nicole Garcia.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, not an issue. Thank you for searching.

ASSISTANT: Thank you for choosing us.