You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Rodriguez.

ASSISTANT: What assistance do you need from us?

USER: I am in a  hurry to travel Philadelphia to attend a convocation meeting in the middle of April month, can you please help me to book a flight ticket from HOU to PHL?

ASSISTANT: Sure, I am here to help you with the ticket booking.

USER: Thank you for your positive response.

ASSISTANT: Will you please share your planned travel dates?

USER: Sure, I would like to departure on 04/16 and arrival back on 04/18.

ASSISTANT: Ok, please wait a moment while I am searching the flight.

USER: Sure and please make that price may not increase more that 200 that I cannot afford more that that.

ASSISTANT: Sorry to inform you, there is no flight which is matching to your budget limit.

USER: Ok, that's fine. I can reach other travel agency to book the ticket. Thank you for your help.

ASSISTANT: You are most welcome. Thank you for contacting our travel agency.

USER: Welcome.