You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need your assistance in booking a flight ticket. Could you help me out?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: August 1 and 3 are my planned travel dates.

ASSISTANT: May I know your source point and destination point?

USER: I need you to book a flight ticket from IAH to AUS.

ASSISTANT: Do you have any other specifications?

USER: I wish to depart in the afternoon.

ASSISTANT: Let me know your name?

USER: Myself Brian Turner.

ASSISTANT: Ok, wait for some time.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok. Thank you.

ASSISTANT: Thanks for approaching us.