You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Deborah Lewis. I want to change my reservation, can you help me in changing?

ASSISTANT: Sure, I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: Deborah, I have not found any reservation by your name in our database.

USER: Oh! That's ok. Thank you.

ASSISTANT: You are welcome and thank you very much for contacting us.