You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you for today?

USER: I am Edward Hill here, I want to reserve my ticket within the price limit of 200, can you please help me?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: Sure, my respective dates of journey is from 01/04 to 01/06.

ASSISTANT: May I know your airport codes?

USER: Ok, my respective airports codes are from AUS to DEN.

ASSISTANT: Please wait for a moment.

USER: Ok. I will wait.

ASSISTANT: Sorry, no flight is available on your requested dates.

USER: Ok, no problem. I will try with the another travelling agency.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Anyways, thank you for your service.