You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am unable to catch the flight on the departure date so, I am willing to change the trip dates. Can you please help me in changing the details?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: My name is Margaret Martin.

ASSISTANT: Please wait a moment.

USER: Ok, take your own time.

ASSISTANT: Margaret, no reservation has been found on your name in our records.

USER: It's ok, not a problem. Thank you for checking my ticket status.

ASSISTANT: Thank you for approaching us.