You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Sarah Jones.

ASSISTANT: How may I assist you?

USER: I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure, please wait a moment let me check.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found under your name to change it.

USER: Ok, not a issue. Thank you for information.

ASSISTANT: Thanks for contacting us.