You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to attend a live concert in Houston, can you help me to book a flight ticket with single connection?

ASSISTANT: Sure. May I know your name please?

USER: I am Justin Baker.

ASSISTANT: Tell me your airport codes and travel dates please?

USER: My boarding and landing airport codes are BOS and IAH.

ASSISTANT: Ok.

USER:  need to depart on 03/09 and my return date will be on 03/11.

ASSISTANT: Please wait.

USER: Ok, I want to depart and return in the evening.

ASSISTANT: Thanks for waiting. Sorry presently flights are not available with us.

USER: That's ok, I'll choose any alternative. Thank you.

ASSISTANT: Thank you.