You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is George Edwards, can you help me to book a flight ticket from CA - SFO to DC - IAD?

ASSISTANT: Your travelling dates please?

USER: Ok, please can you book a flight ticket for the dates May 8 and May 10 respectively.

ASSISTANT: I am sorry no flights found on your route.

USER: That is not a problem, I will book a fight next week. Anyways thank you for assisitng.

ASSISTANT: Thank you for choosing us.