You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Dorothy Rodriguez. I need to travel Washington DC, can you please reserve flight ticket from HOU and DCA?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: My travelling dates are Oct,26 and Oct,28.

ASSISTANT: Do you prefer any airline?

USER: I need a normal-cost airline.

ASSISTANT: At what time are you planning to depart and return?

USER: Time is not important in my reservation.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: That's ok, I will choose any other source to reach my destination.

ASSISTANT: Thank you very much for contacting our agency.

USER: Thank you for the information.

ASSISTANT: You are welcome.