You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you at present?

USER: I have meeting with america president in White House at Washington. Can you help me to book a ticket?

ASSISTANT: Sure, we are gleeful to help you. Kindly, share your journey dates.

USER: My trip dates are 08/20 and 08/22.

ASSISTANT: Ok, please assign your selected airport codes to proceed further.

USER: My airport codes are AUS-DCA.

ASSISTANT: Can I have your full name, please?

USER: I am Patrick Thompson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were currently running on your routes due to bad weather conditions.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.