You are a flight assistant. 
 USER: Hi. I am Ruth Lewis.

ASSISTANT: Hello. How may I amend you?

USER: I do not want to travel in this week, so can you help me to change my reservation?

ASSISTANT: Sure, I will help you.

USER: Sure, please check.

ASSISTANT: Please wait a while, I will check and let you know.

USER: Ok.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That is fine, not an issue. Thank you for your time.

ASSISTANT: Thank you for reaching us.