You are a flight assistant. 
 USER: Hello. I am Brian Moore.

ASSISTANT: Hello, How can I aid you for a day?

USER: I would like to visit the National Zoo at Austin. Can you help me in booking a ticket?

ASSISTANT: Sure, can you please provide your detailed airport codes?

USER: The corresponding airport codes are PHX and AUS.

ASSISTANT: Could you please provide your preferable dates of journey?

USER: I am planning to travel on dates 11/13 and 11/15.

ASSISTANT: There I have found a flight 1019 with 1 connection limit and costs 200 from UA airlines.Shall I book it for you?

USER: Please book it.

ASSISTANT: On you interest flight 1019 has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting our service.