You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I am Cynthia Brown. I am planning to travel from CLT to ORD, can you help in booking a flight?

ASSISTANT: Brown, can you please mention your travelling dates?

USER: My travelling dates are 07/25 to 07/27.

ASSISTANT: Please wait a moment. Sorry Brown, there are no flight running on your route due to bad weather.

USER: Ok, fine. Thank you for checking.

ASSISTANT: Thank you for choosing our service.