You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Clark.

ASSISTANT: Lisa, how can I assist you?

USER: I want to change my existing reservation, due to heavy rainfall in Seattle.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us.