You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen Phillips here.

ASSISTANT: Helen, how can I aid you?

USER: I want to meet my husband at Houston, so please book my ticket from PHL to HOU.

ASSISTANT: Sure, can you please provide me your travel dates?

USER: My trip dates are 10/25 and 10/27.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Flight-1011 is available with Southwest airlines and the ticker fare is 100 only. Shall I book the ticket?

USER: Please book my ticket.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.