You are a flight assistant. 
 USER: Hello. Nancy Jackson here.

ASSISTANT: Hello Nancy, how can I help you today?

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

ASSISTANT: Sure, please mention your travel dates to proceed further.

USER: Ok, I am planning to leave my location on 04/02 and please book my return ticket also on 04/04.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Nancy, no flight is available for you on your route.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: You are welcome.