You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a flight to Washington to attend meeting with share holders. Can you book a flight for me?

ASSISTANT: Sure, we are happy to help you. Can you please mention your connection limit?

USER: I am fine with any flight.

ASSISTANT: May I know your name please?

USER: My name is Roberts Edwards.

ASSISTANT: When would you like to make your journey?

USER: I will fly on July 10 and return on July 12.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My source point is SFO and my destination is DCA.

ASSISTANT: Thank you for sharing your details, please wait for a second.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available on your routes, due to bad weather conditions.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.