You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Google Agency. May I know your good name please?

USER: My name is Kathleen Thomas.

ASSISTANT: Ok Kathleen, how may I help you?

USER: I want to travel from DCA to BOS for attending a seminar.Could you please help me for booking a ticket?

ASSISTANT: Yes, please provide your preferable dates to travel?

USER: My dates of travel are from 07/02 to 07/04.

ASSISTANT: I'm sorry, there are no flights found which matches with your requirements.

USER: That's so sad to hear. Anyway's, thank you for your time.

ASSISTANT: Thank you for reaching us.