You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Ashley Gonzalez, want to travel from HOU to BOS. Please help me in booking my ticket.

ASSISTANT: Can I know your travel dates?

USER: My travelling dates will be from 06/26 to 06/28.

ASSISTANT: Please hold on for a minute, I will be back with the flight details.

USER: Sure.

ASSISTANT: Sorry Ashley, there is no flight available on your requested dates.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome.