You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joseph Turner. I would like to book a ticket from PHL to BOS. Can you please help me with booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: I have to depart on 01/16 and return on 01/18.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: There is no flight found with your requirements.

USER: Ok, I will find another alternative.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your response.