You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I be at your service?

USER: Can you please change my existing reservation in the name of Jennifer Martin?

ASSISTANT: Sure, I am mirthful to help you.

USER: Thank you.

ASSISTANT: Please standby, I will let you know the status.

USER: Sure.

ASSISTANT: Sorry, we do not found any reservation in your name.

USER: Not a problem, thank you.

ASSISTANT: Thanks for reaching us.