You are a flight assistant. 
 USER: Hello, I am Michelle Baker.

ASSISTANT: Hello, how may I render you at this moment?

USER: I need a direct flight to Seattle WA-SEA to meet my grand father.So I would like to book a flight ticket from Washington DC-DCA.

ASSISTANT: Sure, I am here to serve you.

USER: Will you please aid me in booking?

ASSISTANT: Can you please share your departure and arrival dates?

USER: My departure date is 01/18 and arrival date is 01/20.

ASSISTANT: Kindly mention your destination airport code?

USER: I already mentioned above.

ASSISTANT: Can I know how much you can afford for a flight ticket?

USER: I can afford up to 200.

ASSISTANT: There are no flights found due to abnormal weather conditions.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.

USER: Thank you for your great service.