You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Smith here.

ASSISTANT: How may I assist you today?

USER: I am a social activist, I have to participate in a campaign to protest against government policies. Could you book my flight ticket?

ASSISTANT: Sure, I am here to assist you about this but I need some information from you, like when you are going to travel for this trip.

USER: I will be leaving on March 31 and returning on April 02.

ASSISTANT: May I know your current location and where do you like to travel airport codes?

USER: My genesis and terminus airport codes are CLT and IAH.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your waiting, sorry for this inconvenience, I could not find any flight with your travelling dates.

USER: No problem, thank you for the help.

ASSISTANT: My pleasure.