You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: My name is Ashley Miller. Can you assist me in booking a flight ticket under the price limit of 200 on 06/12?

ASSISTANT: Sure, may I know your airport codes?

USER: My convocation is to be there at Boston, BOS. So I would like to travel from Phoenix, PHX.

ASSISTANT: When do you want to return on?

USER: On 06/14, I will return.

ASSISTANT: There is no flight on your details.

USER: No problem, I will go with another option.

ASSISTANT: Thank you.

USER: Thank you for your response.