You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Betty Johnson, can your help me to book a flight ticket from HOU to SFO?

ASSISTANT: Let me know your travelling dates?

USER: Ok, please book a flight ticket on the dates Apr 11 and Apr 13 respectively.

ASSISTANT: Sure. Connecting flight can be booked with airline Southwest for price 100. Shall I proceed?

USER: Ok, please book the flight ticket.

ASSISTANT: Ticket is booked having flight number 1008.

USER: Thank you for assisting me.

ASSISTANT: Thanks.