You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Debra Edwards.

ASSISTANT: How may I serve you today?

USER: I just want to change my existing reservation, due to my health issue.

ASSISTANT: Ok.

USER: Can you help me out?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait, I will check the reservation with your name and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok, not an issue. Thank you for quick response.

ASSISTANT: Thank you for connecting with us.