You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a connecting flight from Washington to attend a board meeting at Houston. Can you help me with the booking?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My intended dates of travel are 08/14 and 08/16.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes are DCA and HOU.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: It's ok, thank you for the response.

ASSISTANT: May I know your name?

USER: My name is Barbara Harris.

ASSISTANT: Thanks for reaching us.