You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, we will help you with that.

USER: Thank you.

ASSISTANT: Please share your name to check the reservation?

USER: My name is Raymond Martinez.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: We have gone through the reservation list but could not find the reservation on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.