You are a flight assistant. 
 USER: Hi, Helen Taylor here.

ASSISTANT: Hello, how can I help you?

USER: I am a florist and I would like to attend a flower festivals in New York LGA. Can you make a reservation from DCA?

ASSISTANT: Sure, I will help you. Could you please provide your travelling dates?

USER: Sure, I would like to travel on 03/11 and 03/13.

ASSISTANT: Ok, please wait for a while I will update you the availability of flights.

USER: Sure.

ASSISTANT: Thank you for waiting. sorry to say you there are no flights found with your specifications.

USER: Ok, no issues. Thank you for your kind service.

ASSISTANT: Thanks for choosing us.