You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Melissa Wilson here. I would like to travel from PHL - LAX to attend a conference, can you help me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates will be from 03/19 to 03/21.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, please for the availability quickly.

ASSISTANT: There is a flight with ticket fare 200 in UA airlines with a stopover. Is it ok for you?

USER: Ok, please proceed with booking my reservation with UA airlines.

ASSISTANT: Your booking is confirmed with flight number 1004.

USER: Thank you for assisting me with booking.

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

USER: Most welcome.