You are a flight assistant. 
 USER: Hello, I am Frank Taylor.

ASSISTANT: Hello, how can I help you today?

USER: My trip to Houston has been postponed due to delay in my exams, can you please change my reservation?

ASSISTANT: Sure, please wait a while I will check and let you know.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, No reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.