You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Patrick Hernandez here.

ASSISTANT: Nice to meet you Patrick Hernandez.

USER: I am planning to visit National Zoological Park in HOU.

ASSISTANT: Sure, let me know your travelling details.

USER: Sorry, my destination is IAD. My source is AUS. My planning dates are from 09/19 to 09/21.

ASSISTANT: Ok, give me a moment.

USER: I need a direct flight.

ASSISTANT: Happy to say, there is a flight availability with the airline Hawaiian. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Ok, your ticket has been done with flight number 1014.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.