You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I am Janet Hall, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that. Can you please wait for a while.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.