You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Kathleen Jones here. I want to book a flight reservation from BOS - IAH, can you help me out?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates will be from 04/21 to 04/23.

ASSISTANT: Let me check for the availability of flight.

USER: Ok, please check with single connection flight.

ASSISTANT: Kathleen, there is no flight available at your request.

USER: Ok, no issues with it. Thanks for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.