You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Elizabeth Thomas.

ASSISTANT: On what purpose you contact us Elizabeth?

USER:  I planned to attend for a robotics seminar in PHX, can you help me to book the flight ticket from DCA?

ASSISTANT: Definitely, when would you like to travel?

USER: Sure, my planned dates of travelling are 11/12 to 11/14. I need 0 connection flight.

ASSISTANT: Thank you for providing all the information. Please allow me a minute.

USER: Ok.

ASSISTANT: Sorry, no flights found as per your planning. If you have any other plans, feel free to ask. I am glad to help you.

USER: That's fine. Thank you.

ASSISTANT: Thank you for connecting with us.