You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking from DCA to PHX?

ASSISTANT: Sure, please help me with your trip dates.

USER: My travelling dates are from June 9 to June 11.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Can you share your name to proceed further?

USER: My name is Melissa Roberts.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.