You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda Taylor here.

ASSISTANT: Can you please tell me how may I assist you?

USER: I need to reserve a ticket from DCA to DFW, can you help me in doing that?

ASSISTANT: Sure, I am here to help you with the ticket booking. Can you please tell me your trip dates?

USER: My travelling dates are Mar 27 to 29.

ASSISTANT: Ok, which airlines do you prefer to travel?

USER: I am comfortable with any airline.

ASSISTANT: Ok, which flight do you prefer either a direct flight or a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights found on the dates you have given.

USER: Ok, no issues,. Thank you.

ASSISTANT: You are most welcome. Thank you for reaching us.