You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book my ticket from LAX to DCA?

ASSISTANT: Sure, kindly mention your planned travelling dates to proceed further.

USER: My travel dates are Feb 4 and Feb 6 respectively.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer for direct flight.

ASSISTANT:  Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?

USER: No other preferences for me.

ASSISTANT: To proceed further, can I have your name please?

USER: Anna Garcia here.

ASSISTANT: Please be on hold for sometime, as I can check a flight for your journey with the best airlines.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us, have a nice day.