You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Elizabeth Clark here.

ASSISTANT: How can I help you at this moment?

USER: I would like to attend a business meeting in Boston, can you please reserve a flight ticket from IAH to BOS?

ASSISTANT: Sure, I will help you with this. Could you please provide your journey dates to proceed further?

USER: Ok, I am planning to leave my location on 04/24 and please book my return ticket also on 04/26.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Elizabeth Clark, there are no flight services available on this route on your provided dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to reach there. Thank you for the information.

ASSISTANT: Thank you for contacting us.