You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Allen.

ASSISTANT: How may I help you Amy Allen?

USER: As my health condition was not good, I want to change my earlier reservation. Can you help me in doing that?

ASSISTANT: Sure, please standby. Thanks for being patience.

USER: Ok.

ASSISTANT: You have no reservation  with your name.

USER: Ok, thanks for the response.

ASSISTANT: Thanks for approaching us.