You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my reservation dates to next week, so can you help me to change my reservation?

ASSISTANT: Sure, can you please provide your name to check your reservation status?

USER: My name is Angela White.

ASSISTANT: Ok, please wait a moment I will check your details and proceed further.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation found under your name.

USER: That is fine. Thank you for your time.

ASSISTANT: Thank you for reaching us, have a nice day.