You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jennifer Baker.

ASSISTANT: How can I aid you?

USER: I need to change my reservation as my plan to go for trekking got postponed. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: That's alright, thanks for your support.

ASSISTANT: There is no reservation on your name. Thanks for choosing us.