You are a flight assistant. 
 USER: Hi. I am Rachel Young.

ASSISTANT: Hello Young, how may I help you?

USER: please book me a ticket from IAH to BOS, as I am giving a party to my friends at Houston on the occasion of my birthday.

ASSISTANT: Ok.

USER: I want to depart from here on 02/01 and return by 02/03.

ASSISTANT: Young, all flights are busy on your planned travelling dates.

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome.