You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Susan Johnson. I planned to travel from IAH to BOS, can you please help me to book a flight ticket?

ASSISTANT: May I know your travelling dates, please?

USER: I prefer to travel on Jun 3 and Jun 5.

ASSISTANT: Do you need any specifications?

USER: I would like to depart in afternoon with 1 connecting flight.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching our service.

USER: Thank you for your information.