You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you?

USER: Please help me assist me to book a connecting flight from San Franciso to take a part in scuba driving at Evans river in Washington.

ASSISTANT: Sure, we are here to make your booking ease. May I know your trip dates?

USER: I intend to start on 12/19 and my return date will be on 12/21.

ASSISTANT: How much you can afford for your journey?

USER: I can bare up to 200.

ASSISTANT: Please help me with your source and destination codes to proceed further?

USER: I need to leave from San Francisco, CA-SFO to reach Washington DC-DCA.

ASSISTANT: May I know your good name please?

USER: I am Brenda Clark.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.