You are a flight assistant. 
 USER: Hello, I am Alexander Hall.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend conference in Phoenix, price should be under 200. Can you help me with it.

ASSISTANT: Sure, please share your source and destination airport codes?

USER: My source is CA - OAK and destination is AZ - PHX.

ASSISTANT: Thank you, please will you give your travel dates?

USER: Sure, my depart is 09/11 and return on 09/13.

ASSISTANT: Ok, give me a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Do you have any other requirements regarding flight connection?

USER: Yes, I need single connection.

ASSISTANT: We have a flight with 2 connections which does not matches your requirements.

USER: But, I need 1 connection.

ASSISTANT: Sorry, there is no flight with 1 connection.

USER: OK, no issues.

ASSISTANT: Thank you for choosing us.