You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Jason Hernandez here. Can you help me to change my recent reservation because of work postpone?

ASSISTANT: Ok, please wait a moment I will check your reservation status.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found with your name to change it.

USER: That's fine, no issue, anyways thank you.

ASSISTANT: Thanks for reaching us.