You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I need to travel from HOU to IAD, can you help me?

ASSISTANT: Sure, let me know your travel dates?

USER: My trip dates are 06/20 and 06/22.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other preference?

USER: No.

ASSISTANT: Can you mention your name to proceed further?

USER: I am Kevin Williams.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: That's ok. Thank you.

ASSISTANT: Thank you for contacting us.