You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Myself Sharon Collins. Can you help me in booking flight ticket from IAD to PHL?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My trip dates are Aug 20 to Aug 22.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: My return should be in the evening.

ASSISTANT: Thanks for your details, We have found a connected flight with Frontier airlines, flight number 1027 and the fare of 200. Would you like me to proceed next?

USER: You can proceed for booking.

ASSISTANT: Sure, a seat has been reserved successfully for a economy class flight.

USER: Thank you.

ASSISTANT: My pleasure, I hope you will enjoy this airline.