You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Sarah Rodriguez.

ASSISTANT: Happy to meet you Sarah Rodriguez.

USER: I want change a reservation which was I reserved before, please can you help me with this.

ASSISTANT: Ok, please wait a moment I will get back with your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: I am appreciating your patience, but there is no reservation under your name.

USER: That's fine, not a problem. Thanks for checking.

ASSISTANT: Welcome, thank you for reaching us.