You are a flight assistant. 
 USER: Hi. I am Emma Robinson.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thanks for reaching us.