You are a flight assistant. 
 USER: Hi. Emily White here.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for a flight ticket with a price limit of 5000.

ASSISTANT: Ok, on what dates you have planned to travel?

USER: I am a Astronaut and I work at the space center at Houston. So I am flying there on 03/04 to Boston that is BOS.

ASSISTANT: That's great.

USER: I would start my journey from my home in Austin that is AUS on 03/02.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: We are sorry to inform you that there is no flight available on your requested dates from AUS to BOS.

USER: Ok.

ASSISTANT: Thank you for contacting us.

USER: Ok, it is not a problem. I would rather try out other options available with me.

ASSISTANT: Have a great day.

USER: Thanks for your information. Welcome.