You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from IAH to BOS, can you please help me out?

ASSISTANT: Ok, please can I know your dates of journey to book?

USER: I am travelling on these dates Jan 15th and 17th.

ASSISTANT: Ok, please may I know your specifications?

USER: I need single connected flight.

ASSISTANT: Ok, is there any other intents?

USER: I prefer normal-cost.

ASSISTANT: Ok, please wait a moment I will check.

USER: Sure.

ASSISTANT: Ok, thank you for waiting. Sorry, there is no flight ticket available as per your specifications. May I know your name please?

USER: Ok no problem, thank you for your services. Donna Allen here.

ASSISTANT: Ok, thank you for connecting with our agency.