You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Frank Walker.

ASSISTANT: How may I guide you?

USER: My meeting got postponed and I would like to change my reservation to some other dates. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Frank, no reservation has been found on your name in our database.

USER: It's ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting our service.