You are a flight assistant. 
 USER: Hello. I am Betty Campbell.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates will be on June 22 to June 24.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with economy class. My Depart time should be evening.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Welcome, have a great day.