You are a flight assistant. 
 USER: Hi, I am Jennifer Lopez.

ASSISTANT: Hello, How can I support you?

USER: Could you please help me to book a flight ticket with single connection from DC to attend a business meeting in WA?

ASSISTANT: Sure, May I know your travelling dates?

USER: I would like to depart on Aug 12th and my return date will be on Aug 14th.

ASSISTANT: Let me know your source airport code.

USER: My boarding and landing airport codes are DCA and SEA.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you.