You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there something I can help you with?

USER: My name is Christine Lewis. I want to book a ticket to meet my friend in Boston, will you help me with booking ticket from SEA to BOS?

ASSISTANT: Please share your desired travel dates.

USER: I would like to take off on 08/12 and return on 08/14.

ASSISTANT: Ok, I will help you that. Give me a second.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found. Thank you for contacting us.

USER: Thank you for the information.

ASSISTANT: Welcome.